This article by Bee Wilson features in the Financial Times and cites Michael Marmot and his 1970s study into heart disease among Japanese migrants in America.

"...Our loss of the rituals of shared eating time has consequences. Making time for meals can actually offer health benefits. A classic study by epidemiologist Michael Marmot and colleagues in the early 1970s found Japanese-American men to be more prone to heart disease when they adopted the stress-inducing American habits of eating meals in a hurry. Marmot found that diet alone could not explain why so many Japanese men died of heart disease in the US compared to their counterparts in Japan. Desktop Dining The lunch break, if it exists at all, is often used for other activities. The researchers found that when Japanese-American men became culturally less Japanese in the way that they ate — regardless of whether the dishes they were eating were Japanese or western — they were five times more likely to suffer from coronary heart disease. Studies of American men around the same time found that rates of heart disease were highest among those with high levels of individualism, impatience and a desperate sense of urgency about time, all values that American society strongly promoted...”